All manufacturers use suppliers and vendors to some extent. There is one frame shop right now making a great many of the finished frames that others are selling under their own name as if it was their part. AEE had some items we did not make but they did not get relabeled by us as our part with one or two minor instances. If it was ours and we made the finished product we said so.
I no sooner posted this and Dave chimed in with this:
Brent, the owner of Avionics Structures and I graduated high school together, that is why I went to him for help. He had a great fab shop. We talk every couple months.